> If the problem is in gud.el, then we must think about the other users
> of that code, like "M-x gud-gdb".  gdb-display-source-buffer is
> specific to gdb-mi.el.  And I see that as part of your patch you've
> removed the test of gud-minor-mode being gdbmi, which is probably not
> TRT.

Fixed, please see source-window.patch.

> Also, what happens if the function into which you step is already
> displayed in some other window?

Maybe we can modify `gdb-display-source-buffer` to handle that. But I’m not sure if that won’t interfere with other stuff. What do you think?

Yuan